Aye, Aye, Arr and the Seven C's
or
I said, "I've been on telly but I'm no Dean Martin".
or
None, because people who glow in the dark don't need light bulbs.
Note: Topical to the Chernobyl Reactor disaster of 1984.
or
Two. One to take out the bulb and drop it, and the other to try and sell it before it crashes (knowing that it's already burned out).
or